Quark Stars in Generalized Hybrid Metric-Palatini Gravity
We investigate the physical properties of quark stars with two different equations of state in generalized hybrid metric-Palatini gravity. This theory corresponds to a bi-scalar gravitational theory with two non-minimally-coupled scalar fields.The field equations of the metric tensor and scalar fiel...
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| Format: | Article |
| Language: | English |
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Damghan university
2024-03-01
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| Series: | Iranian Journal of Astronomy and Astrophysics |
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| Online Access: | https://ijaa.du.ac.ir/article_409_6395b1045ad63ade051c95fa48d9722f.pdf |
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| _version_ | 1841545099595481088 |
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| author | Reyhaneh Aliannejadi Zahra Haghani |
| author_facet | Reyhaneh Aliannejadi Zahra Haghani |
| author_sort | Reyhaneh Aliannejadi |
| collection | DOAJ |
| description | We investigate the physical properties of quark stars with two different equations of state in generalized hybrid metric-Palatini gravity. This theory corresponds to a bi-scalar gravitational theory with two non-minimally-coupled scalar fields.The field equations of the metric tensor and scalar fields are derived by varying the action with respect to the dynamical fields. We obtain the field equations for static spherically symmetric geometry interior of compact objects. The numerical solutions for two types of quark stars, the MIT bag and CFL model are studied. The solutions reveal the structure of the compact objects. The solutions are obtained for different values of the model parameters. All considered cases show that compact objects are more massive than their general relativity counterpart. The surface redshift and compactness are also obtained which shows that the generalized hybrid metric-Palatini quark stars have higher surface redshift and are more compact than general relativity quark stars. |
| format | Article |
| id | doaj-art-141cf62443cb4e308599a49d0ec58e99 |
| institution | Kabale University |
| issn | 2322-4924 2383-403X |
| language | English |
| publishDate | 2024-03-01 |
| publisher | Damghan university |
| record_format | Article |
| series | Iranian Journal of Astronomy and Astrophysics |
| spelling | doaj-art-141cf62443cb4e308599a49d0ec58e992025-01-12T10:03:29ZengDamghan universityIranian Journal of Astronomy and Astrophysics2322-49242383-403X2024-03-01111455710.22128/ijaa.2024.819.1183409Quark Stars in Generalized Hybrid Metric-Palatini GravityReyhaneh Aliannejadi0Zahra Haghani1School of Physics, Damghan University, Damghan, IranSchool of Physics, Damghan University, Damghan, IranWe investigate the physical properties of quark stars with two different equations of state in generalized hybrid metric-Palatini gravity. This theory corresponds to a bi-scalar gravitational theory with two non-minimally-coupled scalar fields.The field equations of the metric tensor and scalar fields are derived by varying the action with respect to the dynamical fields. We obtain the field equations for static spherically symmetric geometry interior of compact objects. The numerical solutions for two types of quark stars, the MIT bag and CFL model are studied. The solutions reveal the structure of the compact objects. The solutions are obtained for different values of the model parameters. All considered cases show that compact objects are more massive than their general relativity counterpart. The surface redshift and compactness are also obtained which shows that the generalized hybrid metric-Palatini quark stars have higher surface redshift and are more compact than general relativity quark stars.https://ijaa.du.ac.ir/article_409_6395b1045ad63ade051c95fa48d9722f.pdfgeneralized hybrid metric-palatini gravitycfl quark starmit bag modelmass-radius relationcompactness |
| spellingShingle | Reyhaneh Aliannejadi Zahra Haghani Quark Stars in Generalized Hybrid Metric-Palatini Gravity Iranian Journal of Astronomy and Astrophysics generalized hybrid metric-palatini gravity cfl quark star mit bag model mass-radius relation compactness |
| title | Quark Stars in Generalized Hybrid Metric-Palatini Gravity |
| title_full | Quark Stars in Generalized Hybrid Metric-Palatini Gravity |
| title_fullStr | Quark Stars in Generalized Hybrid Metric-Palatini Gravity |
| title_full_unstemmed | Quark Stars in Generalized Hybrid Metric-Palatini Gravity |
| title_short | Quark Stars in Generalized Hybrid Metric-Palatini Gravity |
| title_sort | quark stars in generalized hybrid metric palatini gravity |
| topic | generalized hybrid metric-palatini gravity cfl quark star mit bag model mass-radius relation compactness |
| url | https://ijaa.du.ac.ir/article_409_6395b1045ad63ade051c95fa48d9722f.pdf |
| work_keys_str_mv | AT reyhanehaliannejadi quarkstarsingeneralizedhybridmetricpalatinigravity AT zahrahaghani quarkstarsingeneralizedhybridmetricpalatinigravity |